Abstract: In this talk, I would like to introduce several methods, generating and probing the entangled many-atom states that can overcome the standard quantum limit. The quantum correlations are generated by sending very weak light pulse into the cavity which contains many neutral atoms. We control the properties of the incoming photon, such as the polarization and/or the frequency spectrum, to obtain the final atomic states as desired. Other than engineering entangled many-body states, we also achieve the quantum degeneracy regime only by laser cooling. It is a simple, robust and easy method to cool down the atoms and enhance the inter-atomic correlation. This is the first time that laser cooling all the way to Bose condensations of alkali atoms is experimentally realized.

 

Bio: Dr Jiazhong Hu is currently a postdoctoral scholar in the University of Chicago. He obtained the doctors of philosophy from Massachusetts Institute of Technology in May 2017 and the bachelor of science from Tsinghua University in July 2011. He was also working in the Research Laboratory of Electronic at MIT for many years. His research interest is in the ultracold atomic systems with complex dynamics, long range entanglement or many-body effects. He has achieved a few pioneer results in the experimental atomic physics, such as 3000-atoms entanglement and laser-cooled degenerate gas. He is also serving as a peer reviewer in Physical Review Letters, Physical Review A and et al.